Which of the following is not an assumption of the z test?
A)The population mean (m) and standard deviation (s) are known.
B)The data are interval or ratio.
C)The distribution of random samples is normal.
D)The sample size is less than 30.

Question

Which of the following is not an assumption of the z test?​
A)The population mean (m) and standard deviation (s) are known.
B)The data are interval or ratio.
C)The distribution of random samples is normal.
D)The sample size is less than 30.

Quizplus · Accepted Answer

The z test assumes that the sample size is large (typically n > 30) to ensure the sampling distribution of the mean is approximately normal, even if the population distribution is not.

Which of the Following Is Not an Assumption of the Z